Types of Microscopes

Types of Microscopes Points : Types of Microscopes, The Optical Micrometer, The Photo Electric Microscope, The Toolmaker’s Microscope, The Micrometer Microscope, Workshop Microscopes, Universal Measuring Microscope Various important microscopes specify and explain below:
1. The Optical Micrometer
2. The Photo Electric Microscope
3. The Toolmaker’s Microscope
4. The Micrometer Microscope
5. Workshop Microscopes
6. Universal Measuring Microscope 1. The Optical Micrometer Optical micrometer in fixed by an optical micrometer, the eyepiece datum remains set and image is moved optically to match by it. The quantity by which the image moves can be precise, so providing a micrometer reading. In the microscope, the block has attach to it an arm moving scale in form of an arc, this scale being view against set index in eyepiece graticle. This similar arm carry a small gear section engage by a pinion and this forms the means of operating micrometer. For little inclinations of the block upto about 70, the arc scale be able to linear and give sufficient precision. For several instrument, but for larger inclination the scale have to be non-liner to follow the rather composite link among the angle of tilt and optical displacement.

2. The Photo Electric Microscope Photo electric microscope has mostly change the optical type in a number of measure microscopic applications where maximum precision is required. When the name proposes, the image observation is replaced by extra sensitive photo electric cell. As such cells contain, for several years, replace visual observations in various applications, their use in specific setting on an index line has necessary a good deal of particular development. For a proper signal to be emitting by photo electric cell the light failing on it must be intermittent. Intermittent excitation is frequently produced by several type of regular chopper among the source of light with cell. In this microscope image of line being practical is allowable to fall on a slit which is slightly wider than the thickness of image.

3. The Toolmaker’s Microscope Toolmaker’s microscope is an visual measuring device prepared for external with internal length measurements as well as measurements on screw threads, profiles, curvatures with angles. For these reason, the microscope is give with some measuring attachment such as.
i) Centre stage for mounting of cylindrical components,
ii) Revolving and angle measuring oculars.
iii) Double image ocular,
iv) Optical feeder, and
v) Projection screen

4. The Micrometer Microscope Micrometer microscope is the first type of microscope to use in measurement connected to engineering. The object use is of low power, rarely exceeding x 5 for common use, by an eyepiece of power x 10, an overall enlargement of x 50 is acquire, this being enough for make settings up to an precision of 0.000025 cm. Micrometer box, just under the eyepiece, consists of a brass frame rise on slides and controlled by micrometer drum, graduated directly to 0.001mm.

5. Workshop Microscopes The workshop microscopes commonly consist of a microscope on a simple stand, which might or might not have micrometer control. Taylor-Hobson pattern operate the similar optical components as their larger instrument with can be set in a number of unusual ways, set up on the tool post of a lathe for instance.

6. Universal Measuring Microscope Universal measuring microscope is extremely like to the tool maker’s microscope. Former has wider range of applications with a high accuracy. Higher accuracy is achieved by replace the measuring micrometers by install glass scales which, by proper measuring oculars, be able to give a scale value 0.00 1 mm above a measuring range of 100 mm. Scale value of ratable table is 1’ instead of 3’ in the case of the toolmaker’s microscope. Universal, measuring microscope is extra proper for screw thread measurements mainly while the helix’ angle is greater than 12°.